Nouns denoting natural phenomena

northeaster
a storm blowing from the northeast
 
aerosol
a cloud of solid or liquid particles in a gas
 
snow mist
small crystals of ice
 
medium wave
a radio wave with a wavelength between 100 and 1000 meters (a frequency between 300 kilohertz and 3000 kilohertz)
 
magnetic line of force
a line of force in a magnetic field
 
beta rhythm
the normal brainwave in the encephalogram of a person who is awake and alert; occurs with a frequency between 12 and 30 hertz
 
infrared emission
electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves
 
optical phenomenon
a physical phenomenon related to or involving light
 
daylight
light during the daytime
 
fireball
an especially luminous meteor (sometimes exploding)
 
specific heat
the heat required to raise the temperature of one gram of a substance one degree centigrade
 
polymorphism
(biology) the existence of two or more forms of individuals within the same animal species (independent of sex differences)
 
downdraft
a strong downward air current
 
drizzle
very light rain; stronger than mist but less than a shower
 
beat
a single pulsation of an oscillation produced by adding two waves of different frequencies; has a frequency equal to the difference between the two oscillations
 
hail
precipitation of ice pellets when there are strong rising air currents
 
infrared ray
a ray of infrared radiation; produces a thermal effect (as from an infrared lamp)
 
light air
wind moving 1-3 knots; 1 on the Beaufort scale
 
moment
a turning force produced by an object acting at a distance (or a measure of that force)
 
neutron radiation
radiation of neutrons (as by a neutron bomb)
 
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